Insulating system for high-potential electric conductors.



F. M. LOGKE. INSULATING SYSTEM FOR HIGH POTENTIAL ELECTRIC GONDUGTORS.

AI?PLIOATION FILE D AUG. 27, 1908. 973,204. Patented Oct. 18, 1910.

A UNITED stra ns r gnnr curios,

FRED M. LOCKE, OF VICTOR, N EW YORK, ASSIGNOR TO THE LOCKE INSULATORMANU- FACTURING COMPANY, OF VICTOR, NEWYORK, A CORPORATION OF NEW YORK.

INSULATING SYSTEM FOR HIGH-YOTENTIAL ELECTRIC CONDUCTORS.

Specification of Letters Patent.

Patented Oct. 18, 1910.

Application filed August 27, 19b8, Serial No. 450,527.

To all whom it may concern: 7

Be it known that I, FRED M. LOGKE, of Victor, in the county of Ontario,in the State of New York, have invented new and useful Improvements inInsulating Systems for Higl1.-Pote11tial Electric Conductors, of

.' which the following, taken in connection with the accompanyingdrawings, is a full, clear, and exact description.

This invention relates to certain improvements in insulating systems forhigh potential electric conductors and refers more par: ti cularly tothe series insulator type in which the insulators are suspended insequence between supports with means for supporting the conductorsubstantially midway between two adjacent insulators and alsosubstantially midway between the supports.

My object is to flexibly connect the insulators to each other and totheir supports, so as to afford a limited sway and turning actionrelatively to each other and to their supports to avoid undue strainot'the connections by excessive wind pressure and unequal expansion andcontraction of the parts of the insulating system and conductor,supported thereby, and at the same time aiiording a convenient means forincreasing or diminishing the number of insulators according to thevoltage of the current which the conductor may be required to carry.

Other. objects and uses will appear in the following description.

In the drawings I have shown in elevation partly in section, a seriesof, in this instance,

tour 1 insulators, flexibly connected in sequence to each other to andbetween suitable supports as cross arms 2 and 3, one of the intermediateconnections between two adjacent insulators being adapted to carry anelectric conductor -Al These insulators -1 may be of any desired form orsize and in this instance are each provided with a central reducedexternally threaded or roughened head i-- projecting from one face and athreaded or roughened socket 5- extending inwardly and centrally fromits opposite face, the externally threaded head or boss -4 being adaptedto re ccive a threaded cap 6 while the threaded socket -5 receives ascrew 7-.

Each of the caps 6- is provided with an external eye 8-' with which isflexibly interlocked a similar eye 9 on the lower end of the adjacentscrew 7, thus permitting a limited swing and turning movement of theinsulators relatively to each other. The eye 8 of the cap -6- of theupper insulator is flexibly interlocked with a similar eye 10 on thelower end of a bolt 11-, which is secured to the upper cross arm 2,thereby establishing the flexible connection between the upper insulatorof the series and the upper cross arm. The eye 9 of the lower insulatoris flexibly interlocked with a similar eye 12 on the upper end of a bolt-l3 which is secured to the lower cross arm 3-, thereby establishing a,flexible connection between the lower insulator and lower cross arm sothat the entire series of insulators are flexibly connected to eachother and to the insulators 2 and 3, allowing a limited swing andturning movement relatively to each other and to said supports. One ofthe connections between two of the intermediate insulators isprovidedwith a suitable seat -14?- for receiving, and supporting theadjacent portion of the conductor A-, at the same time allowing saidconductor and its support --14 to move a limited distance relatively toeach other under strains to which either may be subjected by windpressure or unequal expansion and contraction of the parts.

By assembling a system of insulators in the manner just described, it isevident that said insulators are free to turn and to swing limiteddistances, relatively to each'other and to their supports, therebyavoiding excessive strains upon the connected parts which is always moreor less liable to break the insulators where they are rigidly connectedto each other. In other words, the insulators are loosely but flexiblyconnected to each other and to their supports to enable them to flex orturn under Wind pressure and unequal expansion and contraction of theparts, it being understood that these insulators are spaced somedistance apart to afford ample air gap to prevent arcing of any currentleakage from one insulator to the other.

By connecting the insulators in the manner described, it is evident thatthe insulation may be increased or decreased according to the voltage tobe carried and at the same time the mechanical strength of the system isvery much increased because by fastening the insulators at. both endsand 1 providi g one or more flexible connections between them the strainu on the insula- P tion at the point of securement of the Wire which maybe anywhere between the supports will be endwise or axial of theinsulators, that is the pull will be endwise or substantially axial ofthe insulators and connections between them. It is evident, however,that one or more flexible connections may be employed between theinsulators and that the conductor may be fastened to any part of any oneof the connections or to one of the insulators if desired withoutdeparting from the spirit of my invention.

What I claim is v A. system of insulation for high potential electricconductors comprising a series of insulators arranged in superposedsequence some distance apart, supports at opposite ends of the series,connections between the 20 supports and adjacent insulators whereby theinsulators may turn with respect to the supports, separate connectionsbetween ad- 'acent ends ofthe insulators whereby each insulator is freeto turn, and a seat for a conductor on one of the last named connectionsand between the supports.

In witnesswhereof I have hereunto set my hand this 22nd day'of August1908.

FRED M. LOCKE.

Witnesses: 4

GEO. W. ATWELL, Manon: P. Loom

